How do I force full screen with Netflix playing TV?

Example: I was playing episodes of "The Rockford FIles" and noticed that the screen was narrow. I have a plasma and I’m sensitive to the ‘burn in’ issue. But, the controls for widening the screen have no effect. Is there any way to control the screen size during play of Netflix? If not, shouldn’t there be?joeortiz wrote

Unfortunately, it seems that the Netflix app does not support aspect ratio adjustments at this time.